body {
  margin: 0;
  padding: 0;
  font-family: Roboto, PingFang SC, Arial, sans-serif, Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, "\5FAE\8F6F\96C5\9ED1";
}

main {
  background-color: var(--main-background-color);
  height: 100vh;
}